快捷鍵：Q,E; W,S; A,D; F,V;
//=============================================================================
// Desc: 文件網格模型的使用
//=============================================================================
#include <d3dx9.h>
//-----------------------------------------------------------------------------
// Desc: 全局變量
//-----------------------------------------------------------------------------
LPDIRECT3D9 g_pD3D = NULL; //Direct3D對象
LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; //Direct3D設備對象
LPD3DXMESH g_pMesh = NULL; //網格模型對象
D3DMATERIAL9* g_pMeshMaterials = NULL; //網格模型材質
LPDIRECT3DTEXTURE9* g_pMeshTextures = NULL; //網格模型紋理
DWORD g_dwNumMaterials = 0L; //網格模型材質數(shù)量
D3DXVECTOR3 g_vCenter; //網格模型中心點
BYTE m_bKey[256];
D3DXMATRIX g_matWorld;
//-----------------------------------------------------------------------------
// Desc: 設置世界矩陣
//-----------------------------------------------------------------------------
VOID SetWorldMatrix()
{
static long curTime=0;
static float elapsetime=0;
elapsetime = (timeGetTime()-curTime)/1000.0f;
curTime = timeGetTime();
//創(chuàng)建并設置世界矩陣
float fRoll, fPitch, fYaw;
fRoll = fPitch = fYaw = 0.0f;
if (m_bKey['D']) fRoll -= 3*elapsetime;
if (m_bKey['A']) fRoll += 3*elapsetime;
if (m_bKey['S']) fPitch -= 3*elapsetime;
if (m_bKey['W']) fPitch += 3*elapsetime;
if (m_bKey['Q']) fYaw -= 3*elapsetime;
if (m_bKey['E']) fYaw += 3*elapsetime;
//更新網格模型姿態(tài)
static D3DXVECTOR3 vRight, vUp, vLook, vPos;
vRight.x = g_matWorld._11;
vRight.y = g_matWorld._12;
vRight.z = g_matWorld._13;
vUp.x = g_matWorld._21;
vUp.y = g_matWorld._22;
vUp.z = g_matWorld._23;
vLook.x = g_matWorld._31;
vLook.y = g_matWorld._32;
vLook.z = g_matWorld._33;
vPos.x = g_matWorld._41;
vPos.y = g_matWorld._42;
vPos.z = g_matWorld._43;
D3DXVec3Normalize(&vLook, &vLook);
D3DXVec3Cross(&vRight, &vUp, &vLook);
D3DXVec3Normalize(&vRight, &vRight);
D3DXVec3Cross(&vUp, &vLook, &vRight);
D3DXVec3Normalize(&vUp, &vUp);
static D3DXMATRIX matPitch, matYaw, matRoll;
D3DXMatrixRotationAxis(&matYaw, &vUp, fYaw);
D3DXVec3TransformCoord(&vLook, &vLook, &matYaw);
D3DXVec3TransformCoord(&vRight, &vRight, &matYaw);
D3DXMatrixRotationAxis(&matRoll, &vLook, fRoll);
D3DXVec3TransformCoord(&vRight, &vRight, &matRoll);
D3DXVec3TransformCoord(&vUp, &vUp, &matRoll);
D3DXMatrixRotationAxis(&matPitch, &vRight, fPitch);
D3DXVec3TransformCoord(&vLook, &vLook, &matPitch);
D3DXVec3TransformCoord(&vUp, &vUp, &matPitch);
g_matWorld._11 = vRight.x;
g_matWorld._12 = vRight.y;
g_matWorld._13 = vRight.z;
g_matWorld._21 = vUp.x ;
g_matWorld._22 = vUp.y ;
g_matWorld._23 = vUp.z;
g_matWorld._31 = vLook.x;
g_matWorld._32 = vLook.y;
g_matWorld._33 = vLook.z;
//向前移動
if (m_bKey['F'])
{
g_matWorld._41 += 30*elapsetime * vLook.x;
g_matWorld._42 += 30*elapsetime * vLook.y;
g_matWorld._43 += 30*elapsetime * vLook.z;
}
//向后移動
if (m_bKey['V'])
{
g_matWorld._41 -= 30*elapsetime * vLook.x;
g_matWorld._42 -= 30*elapsetime * vLook.y;
g_matWorld._43 -= 30*elapsetime * vLook.z;
}
g_pd3dDevice->SetTransform( D3DTS_WORLD, &g_matWorld );
}
//-----------------------------------------------------------------------------
// Desc: 設置觀察矩陣和投影矩陣
//-----------------------------------------------------------------------------
VOID SetViewAndProjMatrix()
{
//創(chuàng)建并設置觀察矩陣
D3DXVECTOR3 vEyePt( 0.0f, 10.0f,-20.0f );
D3DXVECTOR3 vLookatPt( 0.0f, 0.0f, 0.0f );
D3DXVECTOR3 vUpVec( 0.0f, 1.0f, 0.0f );
D3DXMATRIXA16 matView;
D3DXMatrixLookAtLH( &matView, &vEyePt, &vLookatPt, &vUpVec );
g_pd3dDevice->SetTransform( D3DTS_VIEW, &matView );
//創(chuàng)建并設置投影矩陣
D3DXMATRIXA16 matProj;
D3DXMatrixPerspectiveFovLH( &matProj, D3DX_PI/4, 1.0f, 1.0f, 500.0f );
g_pd3dDevice->SetTransform( D3DTS_PROJECTION, &matProj );
}
//-----------------------------------------------------------------------------
// Desc: 初始化Direct3D
//-----------------------------------------------------------------------------
HRESULT InitD3D( HWND hWnd )
{
//創(chuàng)建Direct3D對象, 該對象用于創(chuàng)建Direct3D設備對象
if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) )
return E_FAIL;
//設置D3DPRESENT_PARAMETERS結構, 準備創(chuàng)建Direct3D設備對象
D3DPRESENT_PARAMETERS d3dpp;
ZeroMemory( &d3dpp, sizeof(d3dpp) );
d3dpp.Windowed = TRUE;
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
d3dpp.EnableAutoDepthStencil = TRUE;
d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
//創(chuàng)建Direct3D設備對象
if( FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,
D3DCREATE_SOFTWARE_VERTEXPROCESSING,
&d3dpp, &g_pd3dDevice ) ) )
{
return E_FAIL;
}
//設置紋理過濾狀態(tài)
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_SELECTARG1 );
g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR );
g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR );
//設置觀察矩陣和投影矩陣
SetViewAndProjMatrix();
ZeroMemory( m_bKey, 256 );
D3DXMatrixIdentity(&g_matWorld);
return S_OK;
}
//-----------------------------------------------------------------------------
// Desc: 從絕對路徑中提取紋理文件名
//-----------------------------------------------------------------------------
void RemovePathFromFileName(LPSTR fullPath, LPWSTR fileName)
{
//先將fullPath的類型變換為LPWSTR
WCHAR wszBuf[MAX_PATH];
MultiByteToWideChar( CP_ACP, 0, fullPath, -1, wszBuf, MAX_PATH );
wszBuf[MAX_PATH-1] = L'\0';
WCHAR* wszFullPath = wszBuf;
//從絕對路徑中提取文件名
LPWSTR pch=wcsrchr(wszFullPath,'\\');
if (pch)
lstrcpy(fileName, ++pch);
else
lstrcpy(fileName, wszFullPath);
}
//-----------------------------------------------------------------------------
// Desc: 創(chuàng)建場景圖形
//-----------------------------------------------------------------------------
HRESULT InitGeometry()
{
LPD3DXBUFFER pD3DXMtrlBuffer; //存儲網格模型材質的緩沖區(qū)對象
//從磁盤文件加載網格模型
if( FAILED( D3DXLoadMeshFromX( L"airplane.x", D3DXMESH_MANAGED,
g_pd3dDevice, NULL,
&pD3DXMtrlBuffer, NULL, &g_dwNumMaterials,
&g_pMesh ) ) )
{
MessageBox(NULL, L"Could not find airplane.x", L"Mesh", MB_OK);
return E_FAIL;
}
//從網格模型中提取材質屬性和紋理文件名
D3DXMATERIAL* d3dxMaterials = (D3DXMATERIAL*)pD3DXMtrlBuffer->GetBufferPointer();
g_pMeshMaterials = new D3DMATERIAL9[g_dwNumMaterials];
if( g_pMeshMaterials == NULL )
return E_OUTOFMEMORY;
g_pMeshTextures = new LPDIRECT3DTEXTURE9[g_dwNumMaterials];
if( g_pMeshTextures == NULL )
return E_OUTOFMEMORY;
//逐塊提取網格模型材質屬性和紋理文件名
for( DWORD i=0; i<g_dwNumMaterials; i++ )
{
//材料屬性
g_pMeshMaterials[i] = d3dxMaterials[i].MatD3D;
//設置模型材料的環(huán)境光反射系數(shù), 因為模型材料本身沒有設置環(huán)境光反射系數(shù)
g_pMeshMaterials[i].Ambient = g_pMeshMaterials[i].Diffuse;
g_pMeshTextures[i] = NULL;
if( d3dxMaterials[i].pTextureFilename != NULL &&
strlen(d3dxMaterials[i].pTextureFilename) > 0 )
{
//獲取紋理文件名
WCHAR filename[256];
RemovePathFromFileName(d3dxMaterials[i].pTextureFilename, filename);
//創(chuàng)建紋理
if( FAILED( D3DXCreateTextureFromFile( g_pd3dDevice, filename,
&g_pMeshTextures[i] ) ) )
{
MessageBox(NULL, L"Could not find texture file", L"Mesh", MB_OK);
}
}
}
//釋放在加載模型文件時創(chuàng)建的保存模型材質和紋理數(shù)據(jù)的緩沖區(qū)對象
pD3DXMtrlBuffer->Release();
return S_OK;
}
//-----------------------------------------------------------------------------
// Desc: 釋放創(chuàng)建的對象
//-----------------------------------------------------------------------------
VOID Cleanup()
{
//釋放網格模型材質
if( g_pMeshMaterials != NULL )
delete[] g_pMeshMaterials;
//釋放網格模型紋理
if( g_pMeshTextures )
{
for( DWORD i = 0; i < g_dwNumMaterials; i++ )
{
if( g_pMeshTextures[i] )
g_pMeshTextures[i]->Release();
}
delete[] g_pMeshTextures;
}
//釋放網格模型對象
if( g_pMesh != NULL )
g_pMesh->Release();
//釋放Direct3D設備對象
if( g_pd3dDevice != NULL )
g_pd3dDevice->Release();
//釋放Direct3D對象
if( g_pD3D != NULL )
g_pD3D->Release();
}
//-----------------------------------------------------------------------------
// Desc: 渲染場景
//-----------------------------------------------------------------------------
VOID Render()
{
// 清除緩沖區(qū)
g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET|D3DCLEAR_ZBUFFER,
D3DCOLOR_XRGB(0,0,255), 1.0f, 0 );
//開始渲染場景
if( SUCCEEDED( g_pd3dDevice->BeginScene() ) )
{
SetWorldMatrix(); //設置世界矩陣
//逐塊渲染網格模型
for( DWORD i=0; i<g_dwNumMaterials; i++ )
{
//設置材料和紋理
g_pd3dDevice->SetMaterial( &g_pMeshMaterials[i] );
g_pd3dDevice->SetTexture( 0, g_pMeshTextures[i] );
//渲染模型
g_pMesh->DrawSubset( i );
}
//場景渲染結束
g_pd3dDevice->EndScene();
}
//在屏幕上顯示場景
g_pd3dDevice->Present( NULL, NULL, NULL, NULL );
}
//-----------------------------------------------------------------------------
// Desc: 窗口過程, 處理消息
//-----------------------------------------------------------------------------
LRESULT WINAPI MsgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
switch( msg )
{
case WM_DESTROY:
Cleanup();
PostQuitMessage( 0 );
return 0;
case WM_KEYDOWN:
m_bKey[wParam] = 1;
return 0;
case WM_KEYUP:
m_bKey[wParam] = 0;
return 0;
}
return DefWindowProc( hWnd, msg, wParam, lParam );
}
//-----------------------------------------------------------------------------
// Desc: 入口函數(shù)
//-----------------------------------------------------------------------------
INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT )
{
//注冊窗口類
WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L,
GetModuleHandle(NULL), NULL, NULL, NULL, NULL,
L"ClassName", NULL };
RegisterClassEx( &wc );
//創(chuàng)建窗口
HWND hWnd = CreateWindow( L"ClassName", L"使用矩陣實現(xiàn)三維模型空間定位",
WS_OVERLAPPEDWINDOW, 200, 100, 500, 500,
GetDesktopWindow(), NULL, wc.hInstance, NULL );
//初始化Direct3D
if( SUCCEEDED( InitD3D( hWnd ) ) )
{
//創(chuàng)建場景圖形
if( SUCCEEDED( InitGeometry() ) )
{
//顯示窗口
ShowWindow( hWnd, SW_SHOWDEFAULT );
UpdateWindow( hWnd );
//進入消息循環(huán)
MSG msg;
ZeroMemory( &msg, sizeof(msg) );
while( msg.message!=WM_QUIT )
{
if( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
else
{
Render(); //渲染場景
}
}
}
}
UnregisterClass( L"ClassName", wc.hInstance );
return 0;
}
posted on 2008-03-25 19:50
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